Improved method of preventing steam-boilers from priming



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PATENT 'GEORGE H. OORLISS, OF PROVIDENCE, RHODE ISLAND:

Specification forming part of Letters Patent No. 36,275), dated August 26, 1862.

To ctZZ whom it may concern.-

Be it known that i, GEORGE H. CoRLIss, of Providence, in the State of Rhode Island, have invented a certain new and useful Improvement for the Prevention of Priming in Steam-Boilers; and Ihereby declarethefollowing to be a full and exact description thereof, reference being had to the accompanying drawings, and the letters of reference marked thereon, in which Figure 1 is a sectional elevation of boiler, showing 'my improvement; Fig. 2, a plan or horizontal projection thereof; Fig. 3, a viewv ot' the front end; and Fig. 4, a view of the rear end of the same.

In all steam-vessels exposed to the hazards of naval warfare itis of the highest importance thatevery portion ofthesteain machinery should be as near as possible to the bottom of the vessel. As now usually arranged the most exposed part of such machinery is the steamchamber of the boilers. To prevent this exposure without incurring the diiiiculty of priming is the special object of my invention, although it maybe usefully employed when such exposure does not exist.

My invention consists in a peculiar arrangement of the pipes which carry off the steam from the boilers.

As shown in the plan, Fig. 2, the mainpipes a a for each boiler, instead of being connected at any one point, are in this instance con-t nected at six separate points, I), b, I)", b", b, and b The ob ect of this is to diffuse the draft of steam from over the whole surface of the water in the boiler.

The nearest approach heretofore madein the direction of this my invention has been in the use of a perforated pipe. My invention differs from that in having, instead of numerous apertures through the shell of the pipe, numerous tubes through which the steam is passed before reaching the main pipe. These several tubes presenttogether an area about equal to that of the main pipe,and convey the steam with entire freedom when theyare not obstructed with water; but when such olistructiou takes place in a portion of the tubes in consequence of the pitching of the ves-- sel or other cause, theremaining tubes with a slightly-increased pressure keep up the supply of steam to the engine, while such increased pressure upon the immersed tubes will have but little effect in propelling the column of water contained in them toward the steam pipe. The consequence is that not enough water passes the submerged pipes to perceptibly affect the working of the engine. The same principle would operate if the main steanrpipe were placed within the boiler above the water and at proper intervals tubes of suitable length were attached, through which the steam would first be passed before reaching themain pipe.

Having thus described my invention, What I claim as new, and desire-to secure by Letters Patent of the United States, is

The method of preventing the priming of steam-boilers by conducting the steam from a common steam-chamber to the main" pipe through numerous tubular orifices arranged substantially as and for the purpose specified.

GEO. H. OORLISS.

\Vitnesses:

DE WITT O. LawRE-NoE, R. L. (Jones. 

